Windows 10 20H2 Host: 126.96.36.199 (70003) Viewer: 188.8.131.52
Having several PCs with online PCs in the Viewer in "All Connections", right clicking in the white space and clicking on "Update Previews 'F5'" does nothing (the PC connection icon is therefore yellow).
Only while logged on to a PC do you see the preview (the PC connection icon is therefore green before "Update Previews 'F5'" is clicked).
It would be nice to be able to ID a PC if it is actively being used or not via the preview, without logging on, as the logging on notifies the user, disturbing their work. I understand that you can silence the notification, however actually logging on with the notification is a good feature too.